A rubber washer looks simple, but it quietly does several different jobs at once: it seals against leaks, cushions parts from impact, spaces components apart, distributes load so hardware doesn't dig in, and insulates against electrical contact and vibration. Here are ten places that combination earns its keep.
10 common rubber washer applications
- Faucets and taps – sealing the valve seat to stop drips.
- Garden hoses and fittings – the classic hose washer that keeps connections watertight.
- Plumbing unions and showerheads – a compressible seal between threaded parts.
- Automotive trim and panels – cushioning fasteners and preventing rattles.
- Electronics and enclosures – insulating and spacing circuit boards and standoffs.
- HVAC and ductwork – sealing and dampening around fasteners.
- Furniture and fixtures – protecting finished surfaces under bolt heads.
- Machinery mounts – absorbing vibration and reducing noise.
- Marine hardware – sealing deck fittings against water intrusion.
- DIY and repair – shimming, spacing and quieting almost anything that vibrates or leaks.
Match the material to the job
Sealing water outdoors? Reach for EPDM. Anything oily? Nitrile. Extreme heat or food contact? Silicone. The material guide covers all seven compounds in detail, and our size guide helps you nail the dimensions.
Ready to find yours? Browse every size and material here.